Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea47d6b20d5f422…

MALICIOUS

PDF

70.5 KB Created: 2021-05-28 06:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3acac8d085e27656dd5383e1f35e4f18 SHA-1: 2f32f475ed0288f423644712e58c47c34ca4db35 SHA-256: cea47d6b20d5f4228ed68ad7a73ad8803e5ea08781f2f799c975913e027bcbf9
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to other sites. The presence of a URL with a 'utm_term' parameter indicates a potential phishing or scam attempt, likely to trick users into downloading further malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ponafet.ru/strik?utm_term=prisioneiras+do+espelho+pdf+download+gr%25C3%25A1tis PDF link annotation
    • https://koduxiwarutuj.weebly.com/uploads/1/3/2/7/132740502/a9ecbd57d9efe9.pdfIn PDF document text
    • https://vobilafulov.weebly.com/uploads/1/3/4/9/134902573/e03a57c3cd4.pdfIn PDF document text
    • https://zogiwabut.weebly.com/uploads/1/3/4/3/134364715/silagebifem.pdfIn PDF document text
    • https://musigimipipo.weebly.com/uploads/1/3/4/4/134470090/sexetetuvumekuza.pdfIn PDF document text
    • https://vumeganutubaxo.weebly.com/uploads/1/3/1/4/131406578/xuzazi-bivazapavitok-vekepot-pedadowegaw.pdfIn PDF document text
    • https://sosedegif.weebly.com/uploads/1/3/2/8/132815053/fevilukeg.pdfIn PDF document text
    • https://rilopogikumifo.weebly.com/uploads/1/3/4/3/134320310/4636957.pdfIn PDF document text
    • https://piladokad.weebly.com/uploads/1/3/4/7/134759874/wupir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386849/normal_5fe368c8b01b5.pdfIn PDF document text
    • https://joxeluduxena.weebly.com/uploads/1/3/4/7/134772203/5938117.pdfIn PDF document text
    • https://gozerezujokosas.weebly.com/uploads/1/3/4/8/134856803/pefodujonudasu_velurunixizi_luzozigowi_lopudosek.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/1270376.pdfIn PDF document text
    • https://rogifegupoxixo.weebly.com/uploads/1/3/4/0/134040774/sunibowesugedotik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479445/normal_5fd66e0f443bc.pdfIn PDF document text
    • https://wufodiwefoveve.weebly.com/uploads/1/3/4/8/134891768/bolez-tijem-puliledizasage.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0784e28-4570-41ad-aa81-6b88c157252c/karirarip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ee50519-fb28-479b-b9c4-7a4d7864f033/the_easy_way_to_stop_smoking.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD127 5628 bytes
SHA-256: 6179e053877af3deb2c30ef466188a2b253087550361ea6d1dbc086cf5f43cad
font_01_sfnt_off0000e3ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CE 12680 bytes
SHA-256: 79563405d109e6c6b61f63ec0ab97455e578402cfae8e17e3eac9fce72ecf657

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